Results 41 to 50 of about 13,503 (229)
Aerogels – Production, Properties and Applications
KONA Powder and Particle Journal, 2014 Aerogels are highly porous sol-gel derived solids. Their properties, which are extremely fascinating as well as very promising for a large number of applications, are due to their nanostructure.
Thorsten Burger +3 more
doaj +1 more source
The cluster model: A hierarchically-ordered assemblage of random-packing spheres for modelling microstructure of porous materials [PDF]
, 2008 A new structural model based on the premises widely used for describing the structure of random materials, and especially aerogels, is introduced. Aerogels are described as an assemblage of randomly-packed spheres in several hierarchically-ordered levels.
Anta, Juan A. +5 more
core +1 more source
Acta Physica Polonica A, 2008 The size of nanopores in thermally treated samples of silica aerogels was determined by ortho-positronium lifetime measurements at room temperature. The annealing of samples in the temperature region of 300−800◦C does not make substantial changes in pore size felt by positronium.
O. Šauša +5 more
openaire +1 more source
Preparation and Characterization of Silica Aerogel Microspheres [PDF]
Materials, 2017 Silica aerogel microspheres based on alkali silica sol were synthesized using the emulsion method. The experimental results revealed that the silica aerogel microspheres (4–20 µm in diameter) were mesoporous solids with an average pore diameter ranging from 6 to 35 nm.
Qifeng Chen, Hui Wang, Luyi Sun
openaire +2 more sources
Silica-Resorcinol-Formaldehyde Aerogels Nanostructure Modelling
Chemical Engineering Transactions, 2018 The work is devoted to the study and modelling of the internal nanostructure of silica-resorcinol-formaldehyde aerogels. These aerogels are highly porous (up to 98 %) functional materials with a high specific surface area, low thermal conductivity, and ...
Igor V. Lebedev +5 more
doaj +1 more source
Deformation of Silica Aerogel During Fluid Adsorption
, 2005 Aerogels are very compliant materials - even small stresses can lead to large deformations. In this paper we present measurements of the linear deformation of high porosity aerogels during adsorption of low surface tension fluids, performed using a ...
D. R. Daughton +7 more
core +1 more source
Effects of aerogel-like disorder on the critical behavior of O(m)-vector models. Recent simulations and experimental evidences [PDF]
, 2006 We review some results on the effect of a specific type of quenched disorder on well known O(m)-vector models in three dimension. Evidences of changes of criticality in both systems, when confined in aerogel pores, are briefly referenced. The 3DXY model (
Paredes, Ricardo, Vasquez, Carlos
core +3 more sources
Novel bioactive materials: silica aerogel and hybrid silica aerogel/pseudowollastonite
Boletín de la Sociedad Española de Cerámica y Vidrio, 2014 Silica aerogel and hybrid silica aerogel/pseudowollastonite materials were synthesized by controlled hydrolysis of tetraethoxysilane (TEOS) using also methanol (MeOH) and pseudowollastonite particles. The gels obtained were dried using a novel process based on an ambient pressure drying. Hexane and hexamethyl-disilazane (HMDZ) were the solvents used to
Reséndiz-Hernández, P. J. +6 more
openaire +2 more sources
Silica aerogels with tailored chemical functionality
Materials & Design, 2020 Silica aerogels are highly porous (~95%), predominantly mesoporous (20–50 nm) materials with very high surface area (~800 m2/g), but applications that valorize the chemical properties linked to the high surface area lag behind those that valorize the ...
Zhi Li +3 more
doaj +1 more source
Progress in development of silica aerogel for particle- and nuclear-physics experiments at J-PARC
, 2014 This study presents the advancement in hydrophobic silica aerogel development for use as Cherenkov radiators and muonium production targets. These devices are scheduled for use in several particle- and nuclear-physics experiments that are planned in the ...
Kawai, Hideyuki, Tabata, Makoto
core +1 more source